This is another one of those 2 sides to every story posts. We aren't getting the full picture here, for all we know you blew everything right away on 90% overhealing then had nothing left. Or your "explanation" that it was the tanks fault could have been worded rather rudely which is why you were kicked.

That's not to say bad tanks don't exist, but a good healer can most definitely carry a bad tank, there's not really more of a skill gap there than on any other job. Bad dps, a pull will take too long, bad healer, the tank won't survive long enough, bad tank, the pull was probably larger than they were ready for. It's a group effort, everyone is contributing something and if that something is lacking, you're all going to die.